US PATENT SUBCLASS 251 / 343
.~ Sleeve valve

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

341  DF  VALVE ACTUATOR IS VALVE CASING OR EXTENSION THEREOF {5}
343.~ Sleeve valve {2}
344  DF  .~.~> Flow passage in sleeve
345  DF  .~.~> Rotary

DEFINITION

Classification: 251/343

(under subclass 341) Devices in which a movable sleeve constitutes the valve head.